Internal-combustion engine.



C. REGENBOGEN.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED AUG 2,1912.

STATES PATENT OFFICE.

' comp nnennnoemr, or man, GERMAM, ASSIGNOB 'ro rnmn. mwrr AKTIENGE;

SELLSCEAIT, GEBLIANIAWERFT, OF KIEL-GAABDEN, GERMANY.

INTEBNADCOMBUSTION ENGINE.

Application am August 2, 1912. Serial No. 712,905.

To all whom it may concern 1 Be it known that I, CONRAD Rnonnnoenn, acitizen of-the German Empire,-residing at Kiel, Germany, have inventedcertain new 8 and useful Improvements in Internal-Com- Specification ofLetters Patent.

bnstion Engines, of which the following a specification. I

It is acommon occurrence with mternal combustion engines wherein theiston rod runs through the combustion cham er, as for instance in doubleacting engines, that the iston will beburnt'by the influence of the otgases. The piston rod then becomes rough at the burnt place and will nolonger .1 'run smoothly in the st'ufling box; its

' strength is generally also affected from the great corrosion caused bythe jet of fuel die rected against it. r The object of the presentinvention'is now $0 to remove this disadvantage.

In the drawin three embodiments are represented and" igure 1 shows apartof the working cylinder and the'piston of an internal combustion enginein 10 'tudinal 2i section;Fig. 2, a similar view to ig. ,1 of

a second embodiment of theinventionimnd Fig. 3 also a similar viewto.Fig. 1 of a third embodiment of the invention.

B. the pistonfand" G. thepiston rod, w 'ichin the usual manner isattached 'to .the.; piston v head B-by means ofa conec' andanut c 85 Dis the cylinder cover and E. thefstufling box. p

The combustion chamber Fuis poc et shaped/and is as usual situated inthe p cjectmg part ofthe cylinder cover.

40 Valves, necessary I for, controlling the workingofan engine of thiskind, are 'situ-- 'ated in the valve bormgs G, which open into thecombustion chamber as; indicated in the drawing.

In accordance with invention, the

piston head, see Fig. 1, isjprovided with an annular rib H which isadapted to register\ with-a corresponding groove'H in the cylinder coverwhen the piston head is nearing its dead center position, that is at thein:

stant. when the temperature in the combustion chamber is highest; or asshown in the modified form of Fig. 2, an annular rib D Patented Sept. 7,1915.

head for the same purpose. The hotgases remaining'in the combustionchamber F can therefore not directlyreach the piston rod, but they nowinstead come in contact with the annular rib I-I, whereby an effectivepro- 6,0 tection of the piston rod againstburning' is obtained. Q I

'The protection of the piston rodC in the modified form of the inventionshown in- Fig. 3, is attained by providing a sleeve K, I made of-fireproof material, around the piston rod at the endangered place, whichsleeve may moreover be effectively cooled in the manner indicated by thearrows in the drawing.

I claim: I

1. In an internal combustion engine having a piston rod running throughthe combustion chamber, means for completely covering the piston rodthus protecting it from as direct contact with the combustion gases atthe instant when the temperature is highest in the combustion chamber,said means com: prising interengaging male and. female 7. members. 1 M

an internal combustion engine, the "combination of a housing, acombustion j j ch'amber, cylinder cover, and piston having Referringfirst tothe; embodiment shown-f I 1 berg-with an..an,'nular male memberand a It corresponding female member, adapted to 'the'piston rod'grunning through said chamregister ;.w ith eachothenthus completelyill-ff closing-said piston lrod'at the instant of the highest 2temperature-21in the combustion 'chamber,- wherebyl said piston rod.will he protectedfrom' direct" contact with. the hot 7 gases.

. register w'ith is provided on the cylinder cover and a cor- 5Qresponding groove ortecess B in the piston 3; In an internalcombnstignengine, the combination of a", housing, a .--combustionchamber, cylinder cover, and piston having 0! the piston rod runningthrough said cha n.- ber; with an annular male member andlacorresponding female member, adapted to each other thus completely.inclosing said piston rod at the instant of 1,1 the highest temperature,in the combustion chamber, whereby said piston rod will be protectedfrom direct contact with the hot. gases; said members situated one onsaidpiston and the other on said cylinder cover.

4. In an internal combustion engine ha?- ing a cylinder, cylinder cover,piston and piston rod running through the combustion chamber, means forcompletely coveringthe piston rod thus protecting it from direct mntz-mt"with the combustion gasesat the in at when the temporatui e is highestin the mg an annular iiibonsaid piston an& a cor V resgmnciing groove insaid cylinder cover. 1 In an internal combustion engine hav,,

ii'ig' a piston rod running through the com;

hustiou chamber, means for completely cove] ii the piston rod andprotecting it from ontact with the combustion gases at: the instantwhenthe temperature is highest in the combustion chamber; said means'znprisingan anuulazrqmale member pa'r taking of the movement of saidpiston and a corresponding stationary female member adapted to registerwiththemale member at the instant of the highest temperature of the acombustion gases. I

6.1m an internal combustion engine havin'g piston rodrunning through thecombastion cha1nber,' ineans for completely covmin" the piston rod andprotecting it from at contact with the combustion gases at the instantwhen the temperature ishighcstin the combustion chamber; said piston rod*U'JYERKSU'IZ'HV chamber; said means comprlsv being provided With alongitudinal passage fora flow of cooling fluid, and ports loading fromsaid passage directed so as to -a g1n1itthe cooling fluid to said means.Y I7. In an internal combustion enginehavinga piston rod runni ngthrough the cow bustion chamber, means for conipietely coveringthepiston rod and protecting. it' ifronl direct contact with thecombustion gases at the instant Whenthe temperature is highest v in thecombustion chamber; said means comprising an annular male "merhber' vattached i to the piston rodfan'd a cori esponch ing stationary femalemember adapted *"to register Withthe male member at the instant ofexplosion; said pistoni'od: being pi'ovided with longitudinal I branchesfor directing cooling fluid against said male meinber. 3 a I v I In,test mony "whereof have aihXedmIy signature in-preselice of two with 'gv CONRADBEGENBOGENa \Wit'nessesil 2 FERDINAND Roiimiusomk HUdo'LmBEUrJ vpassage amin

